Did anybody ever mention the names of Cissy, Buffy, and Jody's parents and how they died ?

Did anybody ever mention the names of Cissy, Buffy, and Jody's parents and how they died ?

Their names were mentioned, although I don't recall them. They both died in a auto accident.

Not sure about the mother, but I believe the father's name was Bob Davis.

I read on another website that their names were Bob and Mary Davis . Thank you for your answers .